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Home >> Lexus >> 2010 >> IS 350C >> Repair and Diagnosis >> Body & Frame >> Sun Roof/T-Top/Convertible Top >> Retractable Hardtop (Diagnostic Codes (B2536-B256E) & Circuit Tests) >> Retractable Hardtop System >> DTC B2539: Abnormal Roof Drive Motor LH Pulse >> Description

DTC B2539: Abnormal Roof Drive Motor LH Pulse: Description

The sliding roof control ECU assembly controls the speed of the roof panels using pulse signals that are generated by the rotation of the sliding roof drive gear assembly LH (roof motor LH).

DTC No. Detection Condition Trouble Area
B2539 Pulse signals do not occur during sliding roof drive gear assembly LH (roof motor LH) operation or pulse signals show abnormal value.
  • Sliding roof drive gear assembly LH (roof motor LH)
  • Wire harness or connector
  • Sliding roof control ECU assembly